#include<iostream>
using namespace std;
int main()
{
	int t,x,y;
	cin>>t;
	while(t--)
	{
		cin>>x>>y;
		if (x==y)
		{
            if(x%2)cout<<2*x-1<<endl;
			else cout<<2*x<<endl;
		}
		else if (x-2==y)
		{
			if(x%2)cout<<2*x-3<<endl;
			else cout<<2*x-2<<endl;

		}
		else 
		{
			cout<<"No Number\n";
		}
	}
	return 0;
}